Method closePosition

web/public/js/api.js:544–554

* 关闭头寸 (统一方法，使用PositionManager) * @param {string} positionAddress - 头寸地址 * @param {string} password - 钱包密码 (可选)

(positionAddress, password = null)

     * @param {string} password - 钱包密码 (可选)
     */
    async closePosition(positionAddress, password = null) {
        const body = {};
        if (password) {
            body.password = password;
        }

        return this.request(`/positions/${positionAddress}/close`, {
            method: 'POST',
            body: body
        });
    }

    /**
     * 关闭Y代币头寸 (委托给统一方法)